Observation of symmetry lowering associated with the metal-insulator transition in SmRu4P12 by 101Ru-NQR

被引：32

作者：

Masaki, Satoru ^{[1
]}

Mito, Takeshi

Takemura, Masayuki

Wada, Shinji

Harima, Hisatomo

Kikuchi, Daisuke

Sato, Hideyuki

Sugawara, Hitoshi

Takeda, Naoya

Zheng, Guo-qing

机构：

[1] Kobe Univ, Fac Sci, Dept Phys, Kobe, Hyogo 6578501, Japan

[2] Tokyo Metropolitan Univ, Dept Phys, Hachioji, Tokyo 1920397, Japan

[3] Univ Tokushima, Fac Integrated Arts & Sci, Dept Math & Nat Sci, Tokushima 7708502, Japan

[4] Niigata Univ, Fac Engn, Dept Mat Sci & Technol, Niigata 9502181, Japan

[5] Okayama Univ, Dept Phys, Okayama 7008530, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2007年 / 76卷 / 04期

关键词：

SmRu4P12; NQR; multipolar ordering; metal-insulator transition; filled skutterudite;

D O I：

10.1143/JPSJ.76.043714

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the results of NQR (nuclear quadrupole resonance) study on SmRu4P12, one of a few candidates for materials showing octupolar ordering. In this study, we firstly succeeded in observing the Ru-101-NQR signal in filled skutterudite compounds RRu4P12 (R: rare earth). A single Ru-101-NQR signal splits into two resonance lines, having intensity ratio of 3 : 1, just below the metal-insulator (M-I) transition temperature of 16.5 K. This result gives convincing evidence for symmetry lowering in the ordered state of this compound, namely the cubic Im(3) over bar space group for the filled skutterudite compounds is lowered to the trigonal R(3) over bar. The model of the ordered structure characterized by a wave vector q = (1, 0, 0) satisfactorily explains the observed phenomena in the present study and the M-I transition in this compound.

引用

页数：4

共 25 条

[1] Trigonal lattice distortion and ferro-quadrupole ordering in phase IV of CexLa1-xB6 (x=0.75 and 0.70) [J].

Akatsu, M ;

Goto, T ;

Nemoto, Y ;

Suzuki, O ;

Nakamura, S ;

Kunii, S .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2003, 72 (02) :205-208

[2] Thermal Expansion Measurements on Ce0.75La0.25B6 [J].

Akatsu, Mitsuhiro ;

Suzuki, Osamu ;

Nemoto, Yuichi ;

Goto, Terutaka ;

Nakamura, Shintaro ;

Kunii, Satoru .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2002, 71 :115-117

[3] THE PRESSURE-DEPENDENCE OF THE SUPERCONDUCTING TRANSITION-TEMPERATURE OF LAFE4P12, LARU4P12, LAOS4P12 [J].

DELONG, LE ;

MEISNER, GP .

SOLID STATE COMMUNICATIONS, 1985, 53 (02) :119-123

[4] MAGNETIC PHASE-DIAGRAM OF CEB6 [J].

EFFANTIN, JM ;

ROSSATMIGNOD, J ;

BURLET, P ;

BARTHOLIN, H ;

KUNII, S ;

KASUYA, T .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1985, 47-8 (FEB) :145-148

[5] Evidence for magnetic ordering associated with metal-insulator transition in SmRu4P12 studied by muon spin relaxation [J].

Hachitani, K ;

Fukazawa, H ;

Kohori, Y ;

Watanabe, I ;

Sekine, C ;

Shirotani, I .

PHYSICAL REVIEW B, 2006, 73 (05)

[6] Fermi surface instability in Pr-based skutterudites [J].

Harima, H ;

Takegahara, K .

PHYSICA B-CONDENSED MATTER, 2002, 312 :843-845

[7]

ITO TU, IN PRESS J PHYS SOC

[8] Role of p-f hybridization in the metal-nonmetal transition of PrRu4P12 [J].

Iwasa, K ;

Hao, LJ ;

Hasegawa, T ;

Takagi, T ;

Horiuchi, K ;

Mori, Y ;

Murakami, Y ;

Kuwahara, K ;

Kohgi, M ;

Sugawara, H ;

Saha, SR ;

Aoki, Y ;

Sato, H .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2005, 74 (07) :1930-1933

[9]

IWASA K, COMMUNICATION

[10] Lattice distortion and octupole ordering model in CexLa1-xB6 [J].

Kubo, K ;

Kuramoto, Y .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2003, 72 (08) :1859-1862

← 1 2 3 →